Apparatus for cleaning windows



L. HACHEN'BERG APPARATUS FOR CLEANING wmnows July 19, 1927.

Filed Dec. ll. 1925 2 Sheets-Sheet 1 INVENTOR ATTORNEYS I 1,635,991 July 19,1927" L HA CHENBERG APPARATUS FOR CLEANING WINDOWS Filed Dec. 11'. 1925 2 Sheets-Sheet 2 76 77 INVENTOR 719 {m4 7am,

BY 7 %/,MM

ATTORN EYS Patented July 19,1927.

UNITED STATES. PATENT orFrcE- LOUIS HACHENBERG, or THROGGS N Ecx, NEW YORK, assrenon or ONE-HALF TO WILLIAM BRADY, or ossINING, NEW YORK. 7

APPARATUS FOR CLEANING WINDOWS.

Application filed December 11, 1925. Serial No. 74,792.

This invention relates to-improven'ients in '8 window wipers for locomotives, automobiles, and the like, and has for its object to provide a combined scraper and wiper which is automatically actuated by mechanism operated by a relatively small amount of power or fluid pressure.

Another object of this invention is to provide a combined scraper and wiper, which in Wlll be oscillated and caused to clean a substantially square surface of the Window orglass.

Another object is to provide a device having a scraper and cleaning attachment is which presents the smallest possible obstruction to. the vision of the operator. I Another object is to provide a device which is simple in construction and reliable in operation.

Another object is to provide certain im-- provements in the form, c nstruction and arran ement of the parts whereby the above name attained.

A practical embodiment of myinvention is represented in the accompanying draw in s, m which Fig. 1 represents a plan view of my improved device attached to a portion of a so window frame.

' L Fig. 2 represents a front elevation of the same, certain'of the parts being shown in section.

Fig. 3 represents an end elevation of the same.

Fig. 4 represents a vertical section taken in the plane of the line I VIV of Fig. 2, looking in the direction of the arrows.

Fig. 5 represents a vertical section taken in the plane of the line V-V of Fig. 2, looking in the direction of the arrows.

Fig. 6 represents a vertical section taken in the plane of the line VI-YI of Fig. 2, looking in the direction of the arrows.

- Fig. 7 represents a detail horizontal section, on an enlarged scale, taken in the plane oflthe line VII-VII of Fig. 3.

1g. 8 partly in section, on the same scale as Figs 1 to 6 inclusive, showing the parts in another s'ition from that shown in the .previous gures, and Y I Fig. 9 represents a horizontal section on an enlarged scale, of 'a modified form of scraper and wiper.

' depending arm and other objects may be effectively member 22 is represents a detail front elevation, v

The device as a wholeis mounted upon a plate denoted by 1 which is secured to the side rails 2, 3 of the windowframe, in the present instance, by means of screws 44, '5 5. The plate 1 is formed with an upwardly extending ortion 6 which has a tubular bearin 7 mounted in a hole 8 in the upper rail 9 of the window frame. A sleeve 10 is journalled in the tubular bearing. 7, one end of which is arran ed to receive an arm 11, which is secured t ereto -by means of a nut 12 which enga 'es' a threaded end 13 of the sleeve. A sha 14 is mounted to slide longitudinally in; the" sleeve 10 and held against rotation by means of a key 15 70 coacting with the sleeve and shaft. The outer end of the shaft 14 is 'rovided with an enlarged end 16 arrange to receive a 17 secured thereto by a'- set screw 18. y A wiper 19 is mounted in a U-shaped carrier 20 which is arranged to oscillate on a bolt 21 fixed in'the end of the arm 17 The wiper comprises a member 22 having a longitudinal channel 23, in which is secured a flexible contact member 24,,of rubber or other suitable material, which ma be caused to press against'the glass 25 of t e} window. Upon opposite sides of'the member 22 I secure metal scra ers 26, 27. having outwardly turned sharp e gas 28, 29 respectively. The fixed in the carrier 20 by means ofa bolt 30 and nut 31, and permitted to vibrate slightly on the bolt, so that the flexible member 24 will assume a position substantially parallel with the glass when in contact therewith, thus tending to ualize the pressure of the member on the glass throughout its length; The wiper and carrier islimited in its oscillatory movement on the arm 17 by means of a bell crank lever 32 pivoted at 33- on the arm 17, of which'one branch .34 of the lever 32 has a pin .35 arranged to be engaged by the upper end of the wiper, while the branch 36 has a pin 37 which'*project into the path of the upper end of the wiper in its movement. in the other direction. .L This wiper 19 is so mounted in I the U shaped carrier 20 that the distance fromthe bolt 30 to the bottom of. the wi r is eater than the distance. from' the bo t to t e top. 3

The wiper being so hung will function so roe or friction on the lower end as the arm 17 is oscillated.

The flexible element and scrapers are held yieldingly in contact with the glass of the window by means of springs 38, 38* disposed on the shaft .14. The spring 38 is interposed between the nut 12 and a thumb screw 39 which has a threaded enin the end of the arm 11. The outer end of the piston rod 42 is slidable ina block 47, carried by the plate 1, and held against rotation .by means of a key 48 fast to the block 47 and arranged to extend into a groove 49 in thepiston rod. The cylinder is secured to the late lat 50, and is closed at its end by a head 51.-

A valve chamber 52 is disposed adjacent the cylinder 40 and provided with a reciprocatin valve rod 53 which is slidable in a glan 54 of the head 44 and provided with piston valves 55, 56 which reciprocate in the valve chamber 52. The outer end of the valve rod 53 is arranged to reciprocate in a block 57 carried by the plate 1 and held against rotation by means of a key 58 secured to the block 57 and a groove 58* in the valve rod. The valve chamber also has exhaust ports 59, 60 and an; inlet 61. The inlet 61 is located in position in the valve chamber so as to admit uid pressure between the piston valves 55, 56 at all times. Passages 62, 63 are located in the wall between the cylinder 40 and valve chamber 52 and are arranged to open communication between the valve chamber and cylinder and also exhaust the fluid pressure from the cylinder-through the exhaust orts 59, 60.

The piston valves 55, 56 on t e valve rod' 53am arranged to control the opening and closing of the assages 62, 63 respectively to admit or ex aust fluid pressureto andfrom the cylinder 40. The movement of the valve rod 53 is controlled and operated by means of a fin er 64, which is secured to, and depends rom the piston rod 42. This finger 64 moves with the piston rod 42 and is arranged to engage studs 65, 66

' extending laterally from the valverod 53.

' The valve rod is held in position by means of a s ring actuated plunger 67, the upper end 0 WlllCh is provided with a tooth 68 arranged to enter notches 69,1 70- in a rack 71 secured to the valve rod by means of the. stud 66. The plunger is mounted in a bracket 72 carried by the valve chamber- 52 and the tooth 68 is yieldingly held against one or the other of the notches 69, 70 by means of a spring 73, the tension of which may be regulated by a nut 74 having a threaded engagement with the housing 75 of the lunger.

In ig. 9 I have shown a modified form of scrapers and wiper mounted in a U- shaped carrier 7 6 and carried by a bolt 77 in the end of an oscillating arm 78. This wiper comprises a member 79, having a longitudinal channel 80, the outer edges of which are turned outwardly and provided with sharp edges 81, 82. A flexible contact member 83 of rubber or other similar material is secured in the longitudinal channel and may be caused to press against the glass of the window in the manner shown and described in the previous figures.

The operation of the device is as follows 2- I When the piston valves 55, 56 are in the position shown in- Fig. 2, the passage 62 is in open communication with the chamber at the left of the piston 41, w ile the passage 63 opens a free assage 1th the chamber at the right of t e' pisto 41 to the atmosphere through the exhaust port 60. In the position of the piston valve above named the fluid pressure being applied to the inlet pipe 61 will enter the valve chamber 52, thence pass through the passage 62 intothe cylinder 40 and exert its force upon the iston .41 which will be moved to the. right.

his movement of the piston 41 actuates the rod 42 and through the stud 45 fast on the rod, being in engagement with the slot 46 in the arm 11, the shaft 14 will be rocked, WhlCh movement of, the shaft 14 oscillates the arm 17 and hence the scrapers and wiper.

The finger 64 being fast on the rod 42 will also be moved so as to be brought into contact-with the stud 66 on the valve rod 53 which will be moved until the piston valve 55 closes the passage 62, thereby cutting off the fluid pressure to the cylinder 40 therethreugh. As the valve rod 53 is moved by the finger 64, the rack 71, which is fast on the rod 53 will be caused to depress the plunger 67 and force its tooth 68 out of the notch 69 and into engagement with the notch 70. When the bevelled face of the tooth 68 engages the notch 7 0,the tooth will ride upwardly on the side of the notch and, by reason of the spring 73 having an upward stress, the tooth will push the rack 71 and the rod 53 to the right until the tooth com- -pletely reglsters with the notch, as shown in Fig. 8, in which positionthe valve rod 4 53 will have moved the piston valve 56 and opened the passage 63 to the valve chamber 4 52, whereupon the fluid pressure will enter the cylinder 40 at the right of the piston foreign matter, such as ice,

41 and the niotive force exerted to move the piston and rod to the left. As the piston valve 56 was moved to open the pas'sage 63- to the valve, chamber 52, the plston valve simultaneously uncovered the passage 62 and opened the chamber at the left of the piston 42 to external atmosphere through the exhaust port 59. By the movement of the piston 41 and rod 42, the finger 64 will be moved into engagement with the stud 65 on the valve rod 53, which will be carried along until the iiston valve 56 closes the passage 63, at ich position the rack 71 -will have depressed .the plunger 67 and clean a substantially rectangular surface of the window glass, the wiper while being oscillated with the arm 17 is also mounted .to oscillate on the bolt 21 journaled in the arm 17. As the arm 17 is moved to and fro, the wiper will be caused to assume an approx mate vertical position. This position is maintained throughout the movement of the ram 17 by one or the other of the pins 35, 37 on the branches 34, 36 of the bell crank lever 32. For instance, if'the wiper, as shown in Fig. 2, is to be moved to the right, the pin 35 on the branch 34 will engage the upper end of the wiper and maintain the same in an upright position and against movement 'on the bolt 21. If the wiper, as shown in Fig. 8, is to be moved to the left, the pin 37 on the branch 36 will contact with the upper end of the wiper-and hold the same substantially in a vertical position through- The rocking out'its movement to the left. movement of the bell crank lever 32 on its pivot 33 to bring the pins into engagement with the wiper, is automatically controlled by the upper end of the wiper, which is caused to swing on its bolt at each change in the direction of-travel of the arm 17.

While I have shownand described the wiper arranged to be oscillated on the arm.

17, I also wish it understood that the Wiper may, if desired, be held rigid on the arm 17 by locking the carrier securely to the arm 17 through the bolt and nut 21 in which position the wiper will then be caused to clean an arcuate surface of the window glass.

It will also be seen that the sharp edges of the scrapers will function to remove any sleet and snow, from the window glass, while the flexible contact member, interposed between the scrapers, will clean thesurface of the window A glass previously engaged by the scrapers.

It will also be understood that by unscrewing the thumb nut 39 on the shaft 14,

the tension of the springs 38, 38* may be relieved and the flexible element 'alone caused to engage the window glass.

It isobvious that various changes may constructlon and be resorted tom the form, arrangement of the several parts without departing from the spirit and scope of my invention; and hence, I do not intend to be limited to the details herein shown and described except as they may be included in the claims. I

What I claim is 1. An apparatus for cleaning windows comprising, a plate adapted to be fixed to a window frame and provided with a tubular bearing, a sleeve journaled in said bearmg, an arm fixed on said sleeve, a shaft mounted to rotate with the sleeve,

a wiper arm carried by said shaft, means on said wiper arm pivotally supporting a cleaning element, a device pivoted on the wiper arm and having abutments arranged to be engaged by the upper end of the cleaning element to arrest and limit its movement in opposite directions, and mechanism coacting with the arm on the sleeve for oscillating the shaft and wiper arm.

2. An apparatus for cleaning windows comprising, a plate adapted to be fixed to a window frame and provided with a tubular bearing, a sleeve journaled in said hearing, an arm fixed on said sleeve, a shaft mounted to rotate with the sleeve, a wiper arm carried by the shaft, means on said wiper arm pivotally supporting a cleaning element, a bell crank lever pivoted on the wiper arm and having abutments arranged to be engaged by the upper end of the cleaning element to arrest and limit its movement in opposite directions, and mechanism coacting with the arm on the sleeve for oscillating the shaft and wiper arm.

3. An apparatus for cleaningwindows comprising, an oscillatable wiper arm, a cleaning element carried thereby, said element including a longitudinal holder attached to said arm, a resilient contact member secured to said holder, said member being formed of a flat strip of flexible material' folded to form a hollow portion adjacent the contact surface, and scrapers disposed on opposite sides of said member to engage the window glass when the member is compressed.

its

ient contact member secured to said holder, said member being formed of a flat strip of flexible material folded to form a hollow portion adjacent the contact surface, and

scrapers disposed on opposite sides of said member to engage the window glass when the member is compressed.

5. An apparatus for cleaning windows comprising. a plate adapted to be fixed to a window frame and provided with a tubular bearing,a sleeve journaled in said hearing, an arm fixed on said sleeve, a shaft mounted to rotate with the sleeve, a wiper arm rotatable with said shaft, means on said wiper arm supporting a cleaning element, said cleaning element including a resilient contact membeigsaid member being formed of a flat strip of flexible material folded to form a hollow portion adjacent the contact surface, scrapers disposed on opposite sides of said member and arranged to be brought into engagement with the window glass, yielding means on the shaft interposed between the sleeve and wiper arm for normally holding the scrapers out of engagement with the window glass, and mechanism coacting with the arm on the sleeve for oscillating the shaft and wiper arm.

6. An apparatus for cleaning windows arm supporting a cleaning element, saidcleaning element including a resilient con- 1 tact member, said member being formed of' a flat strip of flexible material folded to form a hollow portion adjacent the contact surface, scrapers disposed on oppositesides of said member and arranged to' be brought into engagement with the window glass,- yielding means on the shaft interposed between the sleeve and wiper arm for normally holding the scrapers out of engagement with the window glass, means for mowing the shaft longitudinally in the sleeve for compressing the resilient member and bringing the scrapers into contact with the window glass, and mechanism coacting with the armon the-sleeve for oscillating the shaft and wi er arm. 7

n testimony, that I claim the foregoing as my invention, I have signed my name this 8th day of December, 1925.

LOUIS HACHENBERG. 

